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The Mpemba effect is the name given to the observation that a liquid (typically water) that is initially hot can freeze faster than the same liquid which begins cold, under otherwise similar conditions. There is disagreement about its theoretical basis and the parameters required to produce the effect.
Erasto Bartholomeo Mpemba [1] (1950–2023) [note 1] was a Tanzanian game warden who, as a schoolboy, discovered the eponymously named Mpemba effect, a paradoxical phenomenon in which hot water freezes faster than cold water under certain conditions; this effect had been observed previously by Aristotle, Francis Bacon, and René Descartes.
Download QR code; In other projects ... English: Graph of freezing rates for two water samples to demonstrate the Mpemba effect.
Download as PDF; Printable version; In other projects ... Field effect (semiconductor) Flowability; Free neutron decay; ... Mpemba effect; N. Negative refraction ...
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Mpemba is an African name that may refer to Mpemba, a 13th century confederation in the Congo Basin; Mpemba Kasi, a 14th century Bantu kingdom and northernmost territory of Mpemba, which was incorporated into the founding of the Kingdom of Kongo; Erasto B. Mpemba (born 1950), Tanzanian game warden who discovered the Mpemba effect in water
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